From 1c29ce672fe817c208309eea0c1ff7bf76250f15 Mon Sep 17 00:00:00 2001 From: Vasanthakumar Thiagarajan <vasanth@atheros.com> Date: Mon, 31 Aug 2009 17:48:36 +0530 Subject: [PATCH] ath9k: Do an AHB reset before doing RTC reset Doing an RTC reset when DMA is active may corrupt memory, make sure no DMA is active at this moment by doing an AHB reset. Signed-off-by: Vasanthakumar Thiagarajan <vasanth@atheros.com> Signed-off-by: John W. Linville <linville@tuxdriver.com> --- drivers/net/wireless/ath/ath9k/hw.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c index e340dacc6ebe..71f27f324cea 100644 --- a/drivers/net/wireless/ath/ath9k/hw.c +++ b/drivers/net/wireless/ath/ath9k/hw.c @@ -1712,8 +1712,15 @@ static bool ath9k_hw_set_reset_power_on(struct ath_hw *ah) REG_WRITE(ah, AR_RTC_FORCE_WAKE, AR_RTC_FORCE_WAKE_EN | AR_RTC_FORCE_WAKE_ON_INT); + if (!AR_SREV_9100(ah)) + REG_WRITE(ah, AR_RC, AR_RC_AHB); + REG_WRITE(ah, AR_RTC_RESET, 0); udelay(2); + + if (!AR_SREV_9100(ah)) + REG_WRITE(ah, AR_RC, 0); + REG_WRITE(ah, AR_RTC_RESET, 1); if (!ath9k_hw_wait(ah, -- GitLab